How to create 3 objects using one form only if they are valid?

Question

I want to create Job, Employer and Company using one form.

How to create a Job only if Job, Company and Employer are valid?

Model

class Job < ActiveRecord::Base
  accepts_nested_attributes_for :company, :employer 

  belongs_to :company
  belongs_to :employer

  validates :employer_id, presence: true, on: :update
  validates :company_id, presence: true

  def self.initialize_with_company(job_params)
    company_attributes = job_params.delete(:company_attributes)
    job_params.delete(:employer_attributes)

    new(job_params) do |job|
      job.company = Company.find_or_create_by_nip(company_attributes)
    end
  end

  def create_employer(employer_attributes)
    self.employer = Employer.create(employer_attributes)
  end
end

Controller

class JobsController < ApplicationController
  def new
    @job = Job.new
    if current_employer
      @job.company =  current_employer.companies.first
    else
      @job.company = Company.new
    end
    @job.employer = current_employer || Employer.new
  end

  def create
    employer_attributes = params[:job][:employer_attributes]
    @job = Job.initialize_with_company(params[:job])
    if current_employer
      @job.employer = current_employer
    else
      @job.create_employer(employer_attributes)
    end

    if @job.save
      if current_employer
        redirect_to dashboard_path
      else
        redirect_to jobs_path
      end
    else
      render 'new'
    end
  end
end

View

= simple_form_for @job do |f|
  ...
      = f.simple_fields_for :company do |c|
  ...
      = f.simple_fields_for :employer do |e|
  ...
    = f.button :submit

more helpful discussions... stackoverflow.com/questions/935650/… — Mark Swardstrom
– Mark Swardstrom, Commented Jan 10, 2013 at 17:33

Daniel Evans · Accepted Answer · 2013-01-10 18:10:16Z

0

You can use the ActiveRecord validates_associated method thusly:

  validates_associated :employer
  validates_associated :company

Be aware, it is possible to create a recursive loop of dependent models if you do validates_associated :job in one of the other models. Avoid this.

answered Jan 10, 2013 at 18:10

Daniel Evans

6,8291 gold badge34 silver badges39 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

tomekfranek Over a year ago

Ok, thx looks fine, but how then to prevent creating Employer when other models are not valid?

Daniel Evans Over a year ago

You can prevent the Employer from being created when other models are not valid using the validates associated, just be very careful not to use it to create a circular dependency. If you need to, you can write a custom validator that handles it for your particular situation.

Collectives™ on Stack Overflow

How to create 3 objects using one form only if they are valid?

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related